ISO 4437-4:2022
Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 4: Valves
Plastics piping systems for the supply of gaseous fuels — Polyethylene (PE) — Part 4: Valves
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 21
- Дата публикации:
- 10 ноября 2022 г.
- Издание:
- ISO IS 4437 edition 2 version 1
- ICS:
- 75.200
This document specifies the characteristics of valves made from polyethylene (PE) for piping systems in the field of the supply of gaseous fuels. It is applicable to unidirectional and bi-directional isolating valves with spigot ends or electrofusion sockets intended to be fused with PE pipes or fittings conforming to ISO 4437−2 and ISO 4437‑3 respectively. Valves made from materials other than PE, designed for the supply of gaseous fuels conforming to the relevant standards can be used in PE piping systems according to ISO 4437 series, provided that they have PE connections for butt fusion or electrofusion ends, including integrated material transition joints, conforming to ISO 4437-3. It also specifies the test parameters for the test methods referred to in this document. In conjunction with parts 1, 2, 3 and 5 of the ISO 4437 series, this document is applicable to PE valves, their joints and to joints with components of PE and other materials intended to be used under the following conditions: a) a maximum operating pressure (MOP) up to and including 10 bar[1] at a reference temperature of 20 °C for design purposes; NOTE 1 For the purpose of this document and the references to ISO 8233, MOP is considered to be nominal pressure. b) an operating temperature between −20 °C to 40 °C. NOTE 2 For operating temperatures between 20 °C and 40 °C, derating coefficients are defined in ISO 4437‑5. This document covers valve bodies designed for connection with pipes with a nominal outside diameter dn ≤ 400 mm. [1] 1 bar = 0,1 MPa =105 Pa; 1 MPa = 1 N/mm2.
Abstract
Overview
ISO 4437-4:2022 - Plastics piping systems for the supply of gaseous fuels - Polyethylene (PE) - Part 4: Valves - specifies the characteristics and test parameters for polyethylene (PE) valves used in gas supply piping systems. The standard applies to unidirectional and bi‑directional isolating valves with spigot ends or electrofusion sockets intended to be fused to PE pipes and fittings. It covers valves designed for connections with pipes up to nominal outside diameter dn ≤ 400 mm, a maximum operating pressure (MOP) up to 10 bar (at 20 °C), and normal operating temperatures from −20 °C to 40 °C.
Key topics and technical requirements
- Scope and applicability: PE valves and joints, plus joints between PE and other materials where PE fusion connections conform to ISO 4437‑3.
- Materials: Requirements for PE materials (including PE 100‑RC variants), non‑PE parts, seals, greases and transition joints.
- Design and geometry: Valve body design, spigot and electrofusion end dimensions, operating device dimensions and colour/appearance requirements.
- Mechanical and performance tests: Mechanical characteristics of assembled valves, air flow rate requirements, leaktightness, resistance to bending, tensile loading and impact/thermal cycling tests.
- Physical tests and conditioning: Conditioning procedures and physical property tests (e.g., methods referenced from ISO 1133, ISO 1167).
- Marking and technical documentation: Minimum required marking, delivery conditions and contents of the technical file.
- Test method updates: The 2022 edition adds improved leaktightness testing and updated test methods for PE 100‑RC materials; Annexes cover leaktightness and tensile‑after tests.
Practical applications and users
ISO 4437-4:2022 is intended for:
- Manufacturers of PE valves, fittings and transition joints seeking conformity with international requirements.
- Pipeline and gas distribution system designers and engineers specifying materials and components for low‑pressure and medium‑pressure gas networks.
- Installers and contractors performing butt fusion or electrofusion assembly of valves into PE piping systems.
- Regulators, certification bodies and conformity assessors evaluating valve performance, marking and test evidence.
- Specifiers and procurement teams who need to ensure component compatibility and fitness for purpose up to 10 bar MOP and within the defined temperature range.
Related Standards
- ISO 4437-1, -2, -3, -5 (PE system parts: general, pipes, fittings, fitness for purpose)
- ISO 8233 (valve torque test method)
- ISO 1133, ISO 1167 (material and pressure testing)
- EN standards referenced for valve test methods (EN 736‑1/2, EN 1680, EN 1704/1705)
By following ISO 4437-4:2022, stakeholders ensure PE valve components for gaseous fuels meet consistent design, testing and marking requirements for safe, interoperable gas distribution systems.
Технические детали
- Технический комитет
- ISO/TC 138/SC 7 - Valves and auxiliary equipment of plastics materials
- SKU
- ISO 4437-4:2022
Похожие стандарты
Стандарты, упомянутые в описании